ZEISS IKON CONTAFLEX I Instructions For Use Manual page 21

The Finder
The finder image is only visible after ad-
vancing the film and tensioning the shutter
by the winding knob (12). This at the
same time pushes down the mirror inside
the camera; you know at a glance whether
the camera is ready to shoot.
As long as you can see the large bright
finder image, the lens aperture automati-
cally remains fully open. This permits
comfortable and accurate focusing. On
pressing the release button the spring-
loaded iris jumps to its pre-selected setting
just before the shutter uncovers the film.
The
CONT AFLEX
is the first camera to
utilize this system. The finder always
shows the correct field of view absolutely
without any parallax error, even with the
lens attachments or for close-ups with
supplementary lenses. You can easily
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